1. Crunchyroll - Offers a selection of yaoi anime, including "Given," "Junjou Romantica," and "Love Stage!!"

2. Funimation - Offers yaoi anime such as "Hitorijime My Hero" and "Kono Danshi, Sekka ni Nayandemasu."

3. Hulu - Has a selection of yaoi anime, including "No. 6," "Yuri!!! on Ice," and "Super Lovers."

4. Amazon Prime Video - Offers yaoi anime such as "Love Stage!!" and "Sekai Ichi Hatsukoi - World's Greatest First Love."

5. Netflix - Has a limited selection of yaoi anime, including "Given" and "Ouran High School Host Club."

6. Anime-Planet - A free anime streaming website that offers a selection of yaoi anime, including "Gravitation" and "Sensitive Pornograph."

It's important to note that some yaoi anime may not be available in certain regions due to licensing restrictions. Additionally, some yaoi anime may not be appropriate for all audiences and may contain mature content, so it's important to check the ratings and do your research before watching.

1. Know your audience: Yaoi is a sub-genre of anime and manga that typically features romantic relationships between two male characters. Fans of yaoi tend to be passionate about the genre and have certain expectations when it comes to the storytelling and character dynamics. It's important to have a clear understanding of the tropes and conventions of yaoi in order to write a story that resonates with your target audience.

2. Choose your pairing: Yaoi fans often have a preferred pairing of male characters that they like to see together romantically. When writing yaoi fanfiction, it's important to choose a pairing that has a strong emotional connection and chemistry. Think about why these two characters would be attracted to each other and what obstacles they might have to overcome in order to be together.

3. Develop your characters: In order to create a compelling story, it's important to give your characters depth and complexity. Consider their backstories, motivations, and personality traits. What makes them unique? What are their strengths and weaknesses? How do they complement each other as a couple? Be sure to also include supporting characters who add to the story and help to flesh out the world.

4. Create tension: Tension is a crucial element in any good story, and yaoi is no exception. Think about what obstacles your characters might face in their relationship, such as societal expectations, personal fears, or conflicts with other characters. Use these obstacles to create tension and conflict that drive the story forward.

5. Write with care: Yaoi is often criticized for perpetuating harmful stereotypes or fetishizing same-sex relationships. As a writer, it's important to approach the genre with sensitivity and care. Avoid tropes that could be seen as offensive or derogatory, such as non-consensual relationships, harmful power dynamics, or overly stereotypical portrayals of characters. Write with empathy and respect for your characters and your readers.

6. Have fun: Finally, remember that writing yaoi fanfiction should be enjoyable! Don't be afraid to take risks and try new things. Experiment with different storytelling techniques, explore different genres and tropes, and have fun exploring the relationship between your characters.

In summary, writing yaoi fanfiction can be a fun and rewarding experience for fans of the genre. By understanding the expectations of your audience, developing complex characters, creating tension, and writing with care and empathy, you can craft a successful yaoi story that resonates with readers.

1. Determine your character's background: Every character has a unique backstory that has shaped who they are. Consider where your character came from, what their family life was like, and any significant events that have impacted them. This will help you understand their motivations and provide context for their actions in the story.

2. Establish their personality: Your character's personality will inform how they interact with other characters and the world around them. Consider their likes and dislikes, their strengths and weaknesses, and any quirks or mannerisms that make them stand out. Think about how their personality might clash or complement with the other characters in the story.

3. Create a character arc: A character arc is the journey your character takes throughout the story, from the beginning to the end. Think about what your character wants, what obstacles they will face, and how they will change or grow as a result of their experiences. A compelling character arc can help drive the story forward and keep readers engaged.

4. Consider their relationships: In yaoi fanfiction, the romantic relationship between two male characters is often the focus of the story. Consider how your character's past experiences and personality traits will impact their romantic relationships. Think about the chemistry between your characters and how their relationship will evolve over the course of the story.

5. Give them flaws: No character is perfect, and flaws can make a character more relatable and interesting. Consider what your character's weaknesses are, whether it's a lack of confidence, a short temper, or a tendency to be reckless. These flaws can provide opportunities for character development and conflict within the story.

6. Use supporting characters: Supporting characters can add depth and complexity to your main character. Consider how your character interacts with other characters in the story, and how those interactions might impact their growth and development.

In summary, developing characters for yaoi fanfiction involves creating a backstory, establishing a personality, crafting a character arc, considering their relationships, giving them flaws, and using supporting characters. By taking the time to create compelling and complex characters, you can create a yaoi story that resonates with readers